Title: Neutrino Geophysics at Baksan I: Possible Detection of Georeactor Antineutrinos Show Chinese title

Title: 在巴克桑的中微子地球物理学Ⅰ：地核反应堆反中微子的可能探测

Abstract: J.M. Herndon in 90-s proposed a natural nuclear fission georeactor at the center of the Earth with a power output of 3-10 TW as an energy source to sustain the Earth magnetic field. R.S. Raghavan in 2002 y. pointed out that under certain condition antineutrinos generated in georeactor can be detected using massive scintillation detectors. We consider the underground Baksan Neutrino Observatory (4800 m.w.e.) as a possible site for developments in Geoneutrino physics. Here the intrinsic background level of less than one event/year in a liquid scintillation ~1000 target ton detector can be achieved and the main source of background is the antineutrino flux from power reactors. We find that this flux is ~10 times lower than at KamLAND detector site and two times lower than at Gran Sasso laboratory and thus at Baksan the georeactor hypothesis can be conclusively tested. We also discuss possible search for composition of georector burning nuclear fuel by analysis of the antineutrino energy spectrum. Show Chinese abstract

Abstract: J.M. Herndon在90年代提出了一个位于地球中心的天然核裂变地热反应堆，其功率输出为3-10太瓦，作为维持地球磁场的能量来源。 R.S. Raghavan在2002年指出，在某些条件下，地热反应堆产生的反中微子可以使用大体积闪烁探测器进行探测。 我们考虑将地下巴克桑中微子观测站（4800米水当量）作为地中微子物理发展的可能地点。 在这里，可以在一个约1000吨目标液体闪烁体探测器中实现不到一年一次的本底事件水平，主要的本底来源是来自核电站的反中微子通量。 我们发现这个通量比KamLAND探测器地点低约10倍，比格兰萨索实验室低两倍，因此在巴克桑可以对地热反应堆假说进行明确的测试。 我们还讨论了通过分析反中微子能量谱来搜索地热反应堆燃烧核燃料组成的可能方法。